Solve and graph. Write the solution in interval notation. 
? 2
A. ?
B. 
C. 
D. 
? 
Answer: B
Mathematics
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Solve the problem.A certain radioactive isotope decays at a rate of 2% per 100 years. If t represents time in years and y represents the amount of the isotope left then the equation for the situation is 
In how many years will there be 93% of the isotope left?
A. 700 yr B. 350 yr C. 363 yr D. 253 yr
Mathematics
Factor out the greatest common factor.3x2y5 + 6x2y4
A. y + 2 B. 3x4y2(y + 2) C. 3x2y4(y + 2) D. x2y4(3y + 2)
Mathematics
Solve the equation.
= 5 - 2x
A. {5}
B. 
C. 
D. 
Mathematics
Graph the feasible region for the system of inequalities.x - 2y ? 2 x + y ? 0
A. 
B. 
C. 
D. 
Mathematics